Rather than a mass-mailing worm, BagleDl-L is a Trojan horse that damages security applications and attempts to connect with a number of Web sites. It has been sent via spam lists to millions of addresses in the past 12 hours, said security company McAfee, which has upgraded it to a "medium" risk. The new variant could also have boosted Bagle traffic, which has increased five times in the past 24 hours, e-mail security vendor Postini said on Tuesday